Range stbuctcbe



Jan. 17, 1939. c, T MC LONE 2,143,994

RANGE STRUCTURE Filed May 19, 1936 3 Sheets-Sheet l Jan. 17, 1939. c. T.MCGLONE RANGE STRUCTURE 5 Sheds-Sheet 2 Filed May 19, 1936 Char/es 7. /V6 Z0 c. T. MOGLONE 2,143,994

RANGE STRUCTURE Jan. 17; 1939.

Filed May 19, l936 3 Sheets-Sheet 3 I 77, m v 1 gwuc/wto'r/ Qua e5 77w GLone Patented Jan. 17, 1939 I 2,143,994

UNITED. STATES PATENT OFFICE 2,143,994 A RANGE STRUCTURE Charles T.McGlone, Stroudsburg, Pa., assignor to Kol-Ax Co. Inc., Stroudsburg, Pa.

Application May 19, 1936, Serial No. 80,592

7 Claims. (Cl. 126-1) This invention relates to heating devices, andFigure 8 is a sectional view taken on the line more particularly to animproved range and g 8-4! of Fig. 1. a means for maintaining apredetermined temper- Figure 9 is a detail front elevation, partly atureinteriorly thereof and on the cooking surbroken away, of a modified formof this invenface thereof, and is a continuation in part of tion. myco-pending application on Range structures, Figure 10 is a fragmentaryenlarged front ele- Serial No. 26,475, filed June 13, 1935. vation ofthe thermal control.

An object of this invention is to provide in a Figure 11 is a verticalsectional view taken range structure means for quickly heating thethrough the center of the blower.

w cooking surface thereof and maintaining such Figure 12 isaverticalsection taken transversely 10 heat at a predetermined temperature.through the fan or blower.

Another object of this invention is to provide Referring to thedrawings, wherein like symin a range structure means whereby practicallybols refer to like parts throughout the several complete combustion ofthe fuel is attained, so views, the numeral l0 des gnates generally an15 that a low grade of fuel may be used, thus very outer casing ofsuitable size, which is provided 15 materially reducing the operatingcosts of the with an upstanding warming shelf structure [3. range. Thewall of the casing Ill may be constructed of A further object of thisinvention is to provide uitable h a r in m erial, an a cookin a rangestructure and means for obtaining the top H extends substantially overthe entire length desired heat from a relatively low grade fuel of thecasing Ill. 20 which is controlled in a novel manner so that A grateStructure is 0 d Within the the heat generated by the fuel will beretained casing in adjacent one end, and is disposed above within therange until it has been dissipated. a combined s Chamber and air p ure ca A still further object of this invention is to A firebox M of j ed OStrHCtiOII is provide a means which may be used in the form di p s abovethe grate a d the inner ver- 25 of an attachment for arange structurefor obtical Of this firebox I is p q ed W & taining a turbulent movementwithin the com- Plurahty of Spaced apart Opemngs bustion chamber of therange so that the n inner wall ll extends from the bottom It andterminates at a point spaced downwardly from holes of combustion W111not be quickly drawn the top a L This inner wall H is Spaced from outthrough the smoke pipe. 3

Still another object of this invention is the g g gg ii gg firebox sothat an may freely fi i g fi z iig gg tg 2 1:3 3 An inner bottom wall I9extends horizontally turbulent movement within the firebox or comof thecasing being securegi-at one end to the inner vertical wall or partitionH, and at the bustlon chamber of h F other end to an end wall 20. Aplurality of 35 other obJect? of the mventlon W111 be appar' ovens 2|and 22 are disposed within the casing em cm following descriptionof thepresent It] and supported in downwardly spaced relation preferred formof the invention taken in cont th top H so as to provide an upperheating nection with theaccompanyingdrawings,wherein: duct 23. The oven22 is spaced from the end 40 Figure 1 is a detail front elevation of arange wall 20 and thereby provides a duct 24 which 40 structureconstructed according to an embodicommunicates with the upper duct 23.The bot- 'ment of this invention. tom of the oven 22 is also spaced fromthe inner 1 Figure 2 is a vertical section taken longitudibottom I9 andthereby provides a lower heating nally through the range. duct 25 whichcommunicates at one end with the Figure 3 is a vertical section taken onthe line lower end of the duct 24. 33 of Fig. 2. The oven 2| is disposedin upwardly spaced Figure 4 is a Vertical Section taken 11 the linrelation tothe inner bottom l9 so-that the hot l l of Fig. 2. gases inthe duct 25 may freely pass beneath 5O Figure 5 is a fragmentarysectional view taken this oven and enter a vertical duct 26 which is onthe line 5-5 of Fig. 1. disposed between the wall H and the adjacent F u615 a fragmentary Sectional w taken wall of the oven 2|. An intermediateduct 21 on the line 6-6 of Fig. 2. is disposed between the two ovens 2|and 22 and Figure 7 is a perspective view of one of the communicates atits upper end with the duct 23 bafiles within the range. and at itslower end with the duct 25.

A bafile 28 is rockably mounted on a shaft 29 having a handle 30 at oneend, and this bafile 28 may be provided with openings 30 so as toeliminate any dead space between the two ovens 2i and 22 when the bafile28 is disposed in the position shown in full lines in Fig. 2. Thisbafile 28 permits cutting ofi the oven 22 and also shortening of theheated portion of the top H.

A rear flue 32 extends along the rear of the casing I 0, and has anoutlet 33 which is controlled by a damper 34 operated by a damper rod 35which extends forwardly and is provided with a handle 36 for operationthereof. A suitable smoke pipe or carry-off pipe may be connected to thenipple or outlet 33.

The air pressure and ash chamber 31 which is disposed below thecombustion chamber 38 is provided with a door 39 which is preferablyimperforate and is normally held in tightly locked position. The usualdraft controlling members are eliminated from this air chamber 31.

A fan or blower structure, generally designated as 40 is mounted in thechamber 4| between ,the inner bottom l9 and the bottom l8, and an airduct or pipe 42 is connected at one end to the blower 40 and at theother end to the inner wall I! within 'the air chamber 31. The blower 40comprises a housing 43 having a perforate plate 44 secured to one sidethereof and disposed axially thereof, air being freely admitted to thehousing 43 through the perforations of this plate 44.

The blade structure for the blower 40' comprises a pair of opposedspaced apart truncated members 45 and 46 having annular flanges 41 and48, respectively. Radial blades 49 are positioned between the bases ofthe truncated members 45 and 46 and are secured to a hub 49a which isfastened to a drive shaft 50 carried by a motor 5|. Intermediate blades52 are disposed between the blades 49 and are shorter in length than theblades 49, their inner ends being disposed farther away from the hub 49athan the blades 49. orificebetween the fan -blades at the periphery ofthe fan structure the air is given a rotary or turbulent motion whichcontinues within the P pe 42 and within the air chamber 31.

The motor 5|, which is an electric motor, is connected as by a conductor53 to a thermal switch 54 which is mounted on the front wall 55 of thecasing l0 and which is provided with a projecting portion 56 extendinginto the interior of the oven 2|. The switch 54 may be connected to asuitable source of electric current supply.

In Figure 9 there is shown a modified form of this invention wherein theblower 40' is connected to the air chamber door 31'. The motor 5| isconnected as by a conductor 53' to a thermal switch 54 which is secureddirectly to the door 51 of the oven. In this form the blower means isused as an attachment for a range structure l0.

In the use and operation of this device, the fuel may be placed in thefirebox l4 above the grate l2, and during the starting of the fire thedamper 34 is opened. The thermal switch 54 is then set for thedesired-temperature within the oven 2|, which will also provide thedesired temperature on the top H. After the fire has been started thedamper 34 is closed so as to cut off the uptake of the gases.

The air from the blower 40 will pass into the air chamber 31 in aturbulent stream, and a portion of this air will pass upwardly throughthe By providing a reduced discharge ai iaaei fuel while another portionof the air will pass upwardly between the inner wall l5 of the grate l4and the partition l1. This latter air will then enter the combustionchamber 38 in a horizontal movement counter to the movement of therising gases so that additional air is mixed with the hot gases whichare retained within the combustion chamber a sufficient length of timeto insure substantially complete combustion. The hot gases will thenpass horizontally through the duct 23, heating the top 23 and the top ofthe ovens 2| and 22. Assuming that the baffle 28 is closed, the gaseswill then pass downwardly through the duct 24, and then return along thebottom duct 25. The hot gases in the duct 25 .will heat the bottoms ofthe ovens 2| and 22 and will then enter the duct 26 and pass backthrough the flue 32. The flue 32' will effect a heating of the rearportion of the top I I, the temperature of the rear portion of the top Hbeing lower than that portion of the top I l overlying the duct 23 sothat articles may be kept warm when resting; on the rear portion of thetop H. The damper 34 is provided with the usual gas passages so that areduced quantity of gas may pass therethrough when the damper 34 isclosed.

Where it is desired to cut ofi the oven 22 the baflie 28 may be raisedso that the gases in the duct 23 will pass downwardly through the duct21 into the bottom duct 25. In the event that the air pressure withinthe air chamber 3'! is too high so that the gases will be forced outthrough the top plates of the top I I, the pressure may be reduced bymeans of a damper 58 mounted in the pipe and secured to a rod 59 havinga handle 60 disposed on the outer side of the front wall 55. Air isadmitted to the chamber 4| through a perforate plate 6| which isremovably secured .to the front of the range adjacent the blowerstructure so that when desired this blower structure may be servicedwithout undue inconvenience.

The range structure herein disclosed has been placed in numerous hotelswhere quick heating is necessary, and in every instance the rangestructure has effected an economy in operation suflicient to supplantother types of ranges using gas, oil or electricity as a heating medium.The fuel used in this range may be a relatively low grade of anthraciteor bituminous coal and in actual use it is found that an entire day'soperation of the range will produce only about two handfuls of ashes.The efiicient operation of the I range has been attributed partly to theturbulent action of the air and gases, and also to the fact that therange is operated in a manner opposed to the normal operation, that is,in a normal range when a hot fire is desired so as to produce thedesired temperature along the cooking surface, the smoke pipe damper isleft open, whereas with the present range structure the damper isclosed.

Furthermore, the operation of the blower is controlled by means of thethermal switch 54 which is connected to the oven 2|, and in this mannerthe temperature of the oven 2| will regulate the temperature of theentire range. The thermal switch 54 may be of any suitable construction,it being only necessary that it operate within the temperature rangerequired.

It is apparent that various changes may be made, especially in thedetails of construction, within the scope of the claims appended hereto.

What is claimed is:

1. A range comprising an outer casing, an oven disposed in the casing, aduct extending about said oven, a grate in the casing, a firebox in thecasing above said grate and provided with air openings above said gratedisposed in a position to provide a counter current within the upperportion of the firebox, electrically operated air pressure means belowthe grate, and thermally responsive-means projecting into the oven andconnected to said air pressure means for regulating said air pressuremeans dependent upon the temperature of said oven. I

2. In a range having an oven, a grate, a combustion chamber above saidgrate, and a chamber below said grate; a blower connected to said latterchamber, an electric operating means for said blower, and a thermallyresponsive member connected to said operating means and project-' inginto said oven whereby to regulate said operating means dependent uponthe temperature of the oven.

3. A range structure comprising an outer casing, a cooking top carriedby' said casing, an oven within the outer casing \and having the wallsthereofspaced from the walls of the outer casing and the cooking top toprovide ,a duct thereabout, an inner wall within the casing spaced fromthe adjacent wall of the oven, an outlet duct carried by the casing, adamper within said outlet duct,

a grate supported within the casing between the inner wall and theadjacent outer wall of the outer casing, a pressure chamber below saidgrate, a combustion chamber above the grate communicating with said ductat the top of the oven and below said cooking top, a firebox extendingabove said grate having an inner wall thereof spaced from saidfirst-named inner wall whereby to provide an air passage communicatingat its lower end with said pressure chamber, said firebox havingopenings in the inner wall thereof communicating with said air passageand with the combustion chamber, the air from said pressure chamberrising vertically through said grate and firebox and then passinghorizontally beneath said cooking top, the air from said air passagedischarging horizontally into said combustion chamber in a directioncounter to the movement of air and gases beneath said cooking topwhereby to effect a swirling motion of air and gases within thecombustion chamber, means for discharging air under pressure into thepressure chamber, and thermally responsive means forsaid latter means.

4. In combination, a range structure having discharging air into thechamber below said grate, a thermally responsive means projecting partlyinto said oven and partly exteriorly or said oven, and means connectingsaid thermal means with said blower whereby the operation o said bloweris' dependent upon oven temperature.

6. In combination, a range structure comprising an oven, a ductextending about said oven, a grate, a firebox extending above the grate,a combustion chamber communicating with said firebox and with one end ofsaid duct, said firebox having openings in the inner wall thereof, anair chamber below the grate, a duct communicating with said air chamberand with said air openings, an electrically operated blower discharginginto said air chamber, a thermally responsive means projecting partlyinto said oven and partly:

,exteriorly of said oven, and means connecting said thermal means withsaid blower.

7. In combination, a range including a combustion chamber and an oven, ablower in communication with the combustion chamber, and a thermostatcarried by the range oven and connected to the blower for controllingthe operation of the latter by the oven temperature.

CHARLES T. McGLONE.

